Furnace.



R. W. MENK.

FURNACE.

APPLICATION FILED NOV. 30, 1914. 1,173,831. Patented Feb. 29,1916.

wane/z Jaw? MA z m TED STAS PATENT RUDOLPH W. MENK, OF J'OLIE'I, ILLINOIS, ASSIGNOR TO ARTHUR W. GLESSNER, OF CHICAGO, ILLINOIS.

FURNACE.

Original application filed August 3, 1914, Serial No. 854,618.

Specification of Letters Patent.

30, 1914. Serial No. 874,671.

To all 10 from it may concern Be it known that I, RUDOLPH W. MnNri, a citizen of theUnited States, and a reeldent of Joliet, in the county of Will and State of Illinois, have invented, certain new and useful Improvements in Furnaces, of which the following is a specification.

My present invention relates generally to furnaces, and more particularly to the design and construction of the fire pot or combustion chamber of the furnace, such as described and claimed in my prior application for Letters Patent of the United States, filed August 3rd, 1914, Serial Number 854,618, whereof this application is a division.

The principal objects of the structure which is the subject matter of this application, are the provision of a fire pot and combustion chamber for downdraft or retort furnaces which shall be simple in construction, which shall be free from a liability to clogging, which shall be able to resist the intense heat and disintegrating effects of the blast or flow of burning gases as they leave the mass of ignited fuel, and which will not effect a cooling of such gases such as would cause sooting and deposition of gaseous materials which might otherwise be burned if they had not been prematurely cooled.

I attain the above objects by means of the structure illustrated in the accompanying drawing, in which,

Figure l is a fragmentary half central vertical section of a furnace the fire pot of which is constructed in accordance with my present invention; and Fig. 2 is a perspective of one of the bricks forming the wall of the fire pot.

Similar reference characters refer to similar parts throughout the views.

My present invention relates entirely to the inner portion of a furnace structure, and that is all that I have illustrated, although it will be understood that it is usual to inclose the inner structure with a heat retaining casing any form of which may be employed. Such inner structure is preferably made of cast iron because of its superior heat resisting qualities, and so much thereof as relates to my present invention comprises a hollow and receiving base 10, preferably cylindrical or slightly tapering, and in the top thereof, which is inturned, is provided a preferably circular opening'12, in which is mounted a grate 13. I have illustrated a pyramidal grate, but any grate may be employed.

About the opening 12, in the top of the base casting is a vertical flange, 14, against the outer face of which abuts an annular casting, 15, the wall of which, after rising above the flange, 14, preferably tapers slightly outwardly, and terminates in a horizontally disposed top in which is an annular groove, 16, for the bottom edge of casting, 22, containing flue elbows 25.

Just below the top thereof-the casting, 15, is provided with an annular auxiliary draft passageway, 17, the entrance of air to which may be controlled, in any desired manner. At suitable intervals around the casting, 15, are openings, 19, leading from the auxiliary draft passageway to the inner side of the casting, and extending outwardly from the casting, 15, are radiating fins or ribs, 20, the outer ends of which are connected by the annular vertically disposed Web 21, which is provided to prevent injury to the radiating fins or ribs during shipment or installation.

The casting 22, the lower end of which enters the annular groove, 16, is preferably spheroidal and has upon its upper edge an annular groove, 23, for the reception of the dome casting or section, 28. Just below the top of the casting or section, 22, there is an inwardly and upwardly extending annular flange or hook, 24, from which the fire brick depend as hereinafter described; and from the outside of the casting or section, 22, extend at suitable intervals the before mentioned flue elbows, 25, the upper end of which is provided with a groove 26, for the reception of a suitable flue, 27

Depending from the annular flange or hook, 24, are the fire brick, 37, which are provided with a horizontally disposed recess, 38, for the reception of the hook, 24, and the inner faces of which extend from the top of the casting or section, 22, to approximately the line of the openings, 19, from the auxiliary draft passageway. The outer faces of the fire brick after their point of engagement with the flange or hook, 24, curve outwardly so as to conform with and bear against the inner face of the spheroidal casting or section 22, to a point above the openings into the flue elbows, 25, from whencethey incline inwardly, as at 39, and

terminate with a rounded lower end 41. To

strengthen thelower end, 41, which is op-' It will be seen from the foregoing de scription, taken in connection with the drawing, that the inner face of the brick 37 constitutes thelining'of the container for the fuel, while the outer portion 39 thereof comprises the'wall which forms the above mentioned annular space with which the lower ends of the lines communicate. This results in not only preventing the disintegration of the metal by the intensity of the heat of the burning gases as they leave the body of the fuel, but also, the depending ends of the fire brick: themselves become extremely hot and serve to prevent a cooling of the gases as they leave the body of the burning fuel, and as they are mixed with the air from the auxiliary passageway to such an extent as would cause them to soot or form a deposit by condensation of materials which would be burnable in combination with the air received from the auxiliary draft passageway provided they are maintained at a sufiiciently high temperature.

Having described my invention what I claim. as new and desire to secure by Letters Patent is,

In a heater comprising a fire compartment provided with a grate in the bottom thereof, a peripheral inwardly extending ring adjacent the upper edge of said compartment, flues leading from said compartment at apoint above the grate, an air passage surrounding said compartment having openings therein communicatingwith said compartment at a point intermediate said grate and said flue openings, fire-brick engaging the above mentioned ring and lying adjacent the wall of said compartment above said flues, extending inwardly and downwardly fromthat point to a point below said flue openings but above the air passage, and radial legs extending from the lower ends of said brick contacting the wall of said chamber at a point above said last mentioned openings. p

1 In testimony whereof I atlix my signature in the presence of two witnesses.

' RUDOLPH W. MENK.

' Witnesses: Y -DoN. L. MATEER,

CHAS. J. SHAW.

Gopies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents,

Washington, D. G. 

